Antenna



FIG. 1 is a perspective view of an antenna showing my design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a right side elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines illustrate portions of the antenna which form no part of the claimed invention. 

CLAIM The ornamental design for an antenna, as shown and described. 